Shelf for storage trolleys



FIG. 1 is a front, top, right-hand side perspective view of a shelf for storage trolleys comprising a new, original and ornamental design;

FIG. 2 is a rear, top, left-hand side perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a right-hand side view thereof;

FIG. 6 is a front view thereof;

FIG. 7 is a rear view thereof; and,

FIG. 8 is a left-hand side view thereof. 

CLAIM The ornamental design for a shelf for storage trolleys, as shown and described. 